EP1874088B1 - Dispositif de transmission bluetooth pour appareils auditifs et procédé de transmission correspondant - Google Patents

Dispositif de transmission bluetooth pour appareils auditifs et procédé de transmission correspondant Download PDF

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Publication number
EP1874088B1
EP1874088B1 EP07108797.7A EP07108797A EP1874088B1 EP 1874088 B1 EP1874088 B1 EP 1874088B1 EP 07108797 A EP07108797 A EP 07108797A EP 1874088 B1 EP1874088 B1 EP 1874088B1
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EP
European Patent Office
Prior art keywords
transmission
bluetooth
hearing aid
encoder
signal
Prior art date
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Application number
EP07108797.7A
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German (de)
English (en)
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EP1874088A2 (fr
EP1874088A3 (fr
Inventor
Thomas Dr. Lotter
Jürgen Reithinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sivantos GmbH
Original Assignee
Siemens Audioligische Technik GmbH
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Publication of EP1874088A3 publication Critical patent/EP1874088A3/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/558—Remote control, e.g. of amplification, frequency

Definitions

  • the present invention relates to a transmission device for transmitting audio data to a hearing aid having a transmitting device for transmitting audio data in a Bluetooth signal, an encoder integrated in the transmitting device, for compressing the audio data before transmission, and a relay station for converting the Bluetooth Signal from the transmitting device into a signal for inductive transmission to the hearing aid. Moreover, the present invention relates to a corresponding method for transmitting audio data to a hearing device.
  • FM or infrared devices For wireless audio transmission to hearing aids, predominantly FM or infrared devices are used. These are devices that are placed in place of a hearing aid, which are offered as plug-on modules for hearing aids or that are integrated in a hearing aid with significantly additional space requirements.
  • For the audio transmission are basically several electromagnetic transmission paths into consideration.
  • high frequency far field transmission systems and near field inductive transmission systems can be used.
  • space and power-saving short distances (less than 1 to 2 m) to the hearing aid can be bridged.
  • a far-field transmission system for larger distances (range approx. 10 m) needed for a sensible operation For the audio transmission of televisions or hi-fi equipment, however, a far-field transmission system for larger distances (range approx. 10 m) needed for a sensible operation.
  • a data transmission device for wireless data transmission to a hearing aid which includes a high-frequency receiving device for receiving a high-frequency, modulated signal of an external transmitting unit.
  • a mixing device is used for mixing the high-frequency, modulated signal with a reference signal of similar high frequency, so that a modulated output signal can be generated whose carrier frequency is smaller by at least an order of magnitude and which is suitable for inductive transmission.
  • the output signal to the hearing aid is transmitted inductively by a transmitting device.
  • This converter method results in a minimum delay time over the entire radio link, as it is completely dispensed with a demodulation and decoding and a new modulation and coding.
  • a disadvantage of this transmission is that the entire radio link must be built individually, since the data rate in the high-frequency transmission section must be adapted to the data rate in the section with inductive transmission.
  • the object of the present invention is thus to propose a transmission device and a corresponding transmission method, which entail lower development costs.
  • this object is achieved by a transmission device according to claim 1.
  • the invention also proposes a method according to claim 5.
  • standardized components such as Bluetooth transmitters and Bluetooth receivers as well as the corresponding Bluetooth transmission protocol can thus be used.
  • the standardized components of the BT transmission system are tailored to audio applications (eg error protection).
  • the transmission of the data according to the invention may optionally be bidirectional.
  • data from the hearing aid via the partially standardized transmission path can be transmitted to an external device.
  • the relay station is integrated into a remote control of the hearing device or the hearing aids or else, for example, in a television remote control. This does not require the user to use an additional device for wireless data transmission.
  • the audio bandwidth after compression by the encoder is less than 15 kHz and is favorably between 8 and 12 kHz.
  • the audio data stream is already compressed at the transmitting end so that no non-processable information arrives in the hearing aid.
  • the data rate in the Bluetooth signal is below 150 kbps. This requires no special compression for the inductive transmission in the baseband.
  • FIG. 1 is shown schematically.
  • a stereo audio signal 1 is to be transmitted from a television set or from a hi-fi system to a hearing aid or a hearing aid system for binaural supply.
  • the audio signals 1 are sampled in a Bluetooth transmitter 3 and encoded. In this encoding, the data is compressed and summarized in blocks.
  • the Bluetooth transmitter 3 supports a plurality of standard encoders, of which an encoder 4 can be optionally used for transmission.
  • the audio signal 1 is sampled at 44.1 or 48 kHz, resulting in an audio bandwidth of 20 to 24 kHz for the transmitted signal.
  • the data rate r_bt is typically 230 to 350 kbit / s.
  • the standard Bluetooth transmission link 5 enables wireless communication with a range of up to approx. 10 m.
  • a standard Bluetooth receiver with a matching Bluetooth decoder 7 is arranged to decode the encoded on the Bluetooth transmission link 5 audio data.
  • the data rate For the subsequent inductive transmission to the hearing aid system 2, the data rate must be reduced to the value r_hg. Therefore, a hearing aid encoder 8 is provided in the remote control 6, which reduces the data rate accordingly and provides an audio bandwidth of 8 to 10 kHz. In this way, the data are sent via the inductive transmission link 9 to the hearing aid system 2.
  • Each hearing aid of the hearing aid system 2 has a corresponding hearing aid decoder 10, 11.
  • the greater distance from a television or hi-fi system to the hearing aid can thus be bridged by using a standard transmission method to a hearing aid remote with minimal effort and cost.
  • the standard transmission method uses the Bluetooth method, which is the most widely used standard for wireless stereo audio transmission within a home.
  • the "last meter" from the remote control to the hearing aid is finally bridged inductively.
  • the audio signal is digitized in the Bluetooth transmitting station 3 and transmitted to the relay station, namely the remote control 6, by means of the standardized audio transmission protocol A2DP.
  • This standard protocol requires the support of a license-free codec, SBC.
  • the standard offers the possibility to define / use a manufacturer-dependent codec.
  • the inductive transmission path 9 is selected, in which, however, the data transmission rate must be reduced in order to increase the efficiency and to allow corresponding power savings.
  • the data reduction takes place by the transcoding of the Bluetooth A2DP data stream in the relay station or remote control 6 to a hearing aid data stream.
  • the solution for the wireless radio link shown has some disadvantages.
  • the standard high-bandwidth Bluetooth data transmission is inefficient for operation with a hearing aid.
  • hearing aids are usually operated with lower audio bandwidth (approximately 8 to 10 kHz) than audio applications for normal hearing (greater than 20 kHz).
  • the transcoding in the relay station leads to a reduced audio quality and generates an increased power consumption, whereby the service life of the relay station is reduced.
  • Another disadvantage is that the delay time of the voice and music from the television to the hearing aid is increased due to the double coding delay (long audio blocks on the Bluetooth link) and the processing delays of the remote control. This is to be considered critical in that for the audio transmission from the television to the hearing aid to ensure synchronicity with the images and it comes to the superposition of direct sound from the television with transmitted audio signal to an unwanted coloring or reverberation of the music or speech signal.
  • the in FIG. 2 system shown in principle used In a transmitting station 13, the TV or hi-fi signal 1 is converted into a desired hearing aid format by means of a hearing device encoder 14. This is characterized by the audio bandwidth of 8 to 10 kHz.
  • the signal is encoded by the hearing aid encoder 14, that results in a data rate r_hg suitable for the subsequent inductive transmission path. This is realized by a corresponding block length of the data blocks.
  • the hearing aid encoder 14 which compresses the stereo signal after digitization with hearing aid sampling rate, functions as a standard compliant alternative in the Bluetooth A2DP application to the SBC encoder.
  • the SBC can also be supported in the transmitter, but is not used for the hearing aid application.
  • the remaining part of the physical transmission via Bluetooth A2DP protocol can be used unchanged for the Bluetooth transmission link 15.
  • the Bluetooth data stream is received in the hearing aid format with a standard Bluetooth receiver and can be forwarded without recoding or digital sample rate conversion to an inductive transmitter of the remote control 16.
  • the Bluetooth receiver and the inductive transmitter are therefore in FIG. 2 symbolized as bypass 17.
  • the remaining data transmission path, namely the inductive transmission path 9 and the hearing device system 2 with the hearing device encoders 10 and 11 correspond to those of FIG. 1 ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Claims (6)

  1. Dispositif de transmission pour la transmission de données audio à l'attention d'une oreillette (2) avec
    - un dispositif d'émission (13) pour l'émission des données audio dans un signal Bluetooth,
    - un codeur (14), lequel est intégré dans le dispositif d'émission (13), pour la compression des données audio avant l'émission, et
    - une station relais (16) pour la conversion du signal Bluetooth du dispositif d'émission (13) en un signal pour la transmission inductive à l'attention de l'oreillette (2),
    caractérisé en ce que
    - le codeur diffère d'un codeur SBC et la largeur de bande audio est inférieure à 15 kHz après la compression par le codeur (14),
    - dans la station relais (16), lors de la conversion, aucun transcodage n'est effectué, de sorte que le débit de données et le rythme d'horloge du signal Bluetooth correspondent à ceux du signal pour la transmission inductive,
    - le dispositif d'émission (13) émet conformément au protocole A2DP de Bluetooth et
    - le débit de données dans le signal Bluetooth est inférieur à 150 kbits/s.
  2. Dispositif de transmission selon la revendication 1, dans lequel la transmission de données peut être effectuée de manière bidirectionnelle.
  3. Dispositif de transmission selon la revendication 1 ou 2, dans lequel la station relais (16) est intégrée dans une télécommande.
  4. Dispositif de transmission selon l'une des revendications précédentes, dans lequel la largeur de bande audio se situe entre 8 et 12 kHz après la compression par le codeur (14).
  5. Procédé pour la transmission de données audio à l'attention d'une oreillette (2) avec
    - le codage des données audio par un codeur (14) pour la compression des données audio,
    - l'émission des données audio à l'attention d'une station relais (16) dans un signal Bluetooth,
    - la conversion du signal Bluetooth en un signal pour la transmission inductive à l'attention de l'oreillette (2),
    caractérisé en ce que
    - le codeur (14) diffère d'un codeur SBC, la largeur de bande audio étant inférieure à 15 kHz après la compression par le codeur,
    - lors de la conversion, aucun transcodage n'est effectué, de sorte que le débit de données et le rythme d'horloge du signal Bluetooth correspondent à ceux du signal pour la transmission inductive,
    - l'émission s'effectue conformément au protocole A2DP de Bluetooth, et
    - le débit de données dans le signal Bluetooth est inférieur à 150 kbits/s.
  6. Procédé selon la revendication 5, dans lequel la transmission de données peut être effectuée de manière bidirectionnelle.
EP07108797.7A 2006-06-26 2007-05-24 Dispositif de transmission bluetooth pour appareils auditifs et procédé de transmission correspondant Active EP1874088B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610029196 DE102006029196B4 (de) 2006-06-26 2006-06-26 Bluetooth-Übertragungsvorrichtung für Hörgeräte und entsprechendes Übertragungsverfahren

Publications (3)

Publication Number Publication Date
EP1874088A2 EP1874088A2 (fr) 2008-01-02
EP1874088A3 EP1874088A3 (fr) 2011-05-25
EP1874088B1 true EP1874088B1 (fr) 2015-07-08

Family

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Application Number Title Priority Date Filing Date
EP07108797.7A Active EP1874088B1 (fr) 2006-06-26 2007-05-24 Dispositif de transmission bluetooth pour appareils auditifs et procédé de transmission correspondant

Country Status (6)

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EP (1) EP1874088B1 (fr)
JP (1) JP4749390B2 (fr)
CN (1) CN101098168B (fr)
AU (1) AU2007202880B2 (fr)
DE (1) DE102006029196B4 (fr)
DK (1) DK1874088T3 (fr)

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CN101217038B (zh) * 2008-01-17 2011-06-22 中兴通讯股份有限公司 音频数据子带编码算法编码方法及蓝牙立体声子系统
DE102008019107A1 (de) 2008-04-16 2009-10-29 Siemens Medical Instruments Pte. Ltd. Hörgerätemessvorrichtung und -verfahren
DE102008050351A1 (de) 2008-10-02 2010-04-08 Siemens Medical Instruments Pte. Ltd. System und Verfahren zur Übertragung von Audiodaten an ein Hörgerät
CN102362510A (zh) * 2009-03-24 2012-02-22 松下电器产业株式会社 声音图像再生系统、助听器、以及声音图像处理装置
DE102014204557A1 (de) * 2014-03-12 2015-09-17 Siemens Medical Instruments Pte. Ltd. Übertragung eines windreduzierten Signals mit verminderter Latenzzeit
CN106792466B (zh) * 2016-12-26 2020-10-09 歌尔科技有限公司 一种设备端与主机端通信方法
CN108271144B (zh) * 2018-03-23 2023-12-19 杜宁 一种与终端进行数据双向互传的蓝牙装置和系统
CN108738006B (zh) * 2018-05-31 2021-06-25 出门问问信息科技有限公司 基于蓝牙的数据传输方法及装置
CN108966197A (zh) * 2018-08-20 2018-12-07 南昌黑鲨科技有限公司 基于蓝牙的音频传输方法、系统、音频播放设备及计算机可读存储介质
CN111050306A (zh) * 2018-10-15 2020-04-21 北京轩辕联科技有限公司 用于蓝牙设备的扩展连接方法和扩展连接系统

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US20030114103A1 (en) * 2001-12-19 2003-06-19 Radio Frequency Systems, Inc. Repeater for use in a wireless communication system
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Also Published As

Publication number Publication date
EP1874088A2 (fr) 2008-01-02
CN101098168A (zh) 2008-01-02
DK1874088T3 (da) 2015-10-12
DE102006029196B4 (de) 2009-12-10
JP4749390B2 (ja) 2011-08-17
EP1874088A3 (fr) 2011-05-25
JP2008011527A (ja) 2008-01-17
AU2007202880B2 (en) 2009-07-23
CN101098168B (zh) 2012-10-24
AU2007202880A1 (en) 2008-01-17
DE102006029196A1 (de) 2007-12-27

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